Re: [Haskell-cafe] JSON parser that returns the rest of the string that was not used

For aeson, use the Parser/attoparsec module https://hackage.haskell.org/package/aeson-0.11.2.0/docs/Data-Aeson-Parser.ht... On Sun, May 29, 2016 at 8:48 PM, Nikita Volkov wrote:

I know of at least two packages providing the incremental JSON parsing functionality: http://hackage.haskell.org/package/json-stream http://hackage.haskell.org/package/json-incremental-decoder

Being the author of the latter one I recommend checking out both.

вс, 29 мая 2016 г. в 20:10, Ryan Newton :

...

As someone who spent many years putting data in S-expression format, it seems natural to me to write multiple S-expressions (or JSON objects) to a file, and expect a reader to be able to read them back one at a time.

This seems comparatively uncommon in the JSON world. Accordingly, it looks like the most popular JSON parsing lib, Aeson, doesn't directly provide this functionality. Functions like decode just return a "Maybe a", not the left-over input, meaning that you would need to somehow split up your multi-object file before attempting to parse, which is annoying and error prone.

It looks like maybe you can get Aeson to do what I want by dropping down to the attoparsec layer and messing with IResult.

But is there a better way to do this? Would this be a good convenience routine to add to aeson in a PR? I.e. would anyone else use this?

Thanks, -Ryan

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